I have on my TODO list a separate keybinds menu for add-on keybinds. Haven't started yet, though, it's slowly crystallizing in my head. I've not even decided whether I shall re-use the default menu UI, or make it LAM2-like. It'll most likely require some input from add-ons wishing to be there, so... not going to happen overnight... or overweek
But when I get to it, this looks like a nice feature... and if I decide to re-use the default appearance, should be easy to inject into the default menu as well.